[PATCH 17/39] net: Simplify parse_args()

[Simon Glass]

This function repeats the same code in a few places, namely setting
net_boot_file_name_explicit and copying of the filename to
net_boot_file_name

Move these two operations to the caller, with just the filename (or
NULL) returned by parse_args()

This makes things a little easier to follow.

Signed-off-by: Simon Glass <sjg at chromium.org>
---

 cmd/net.c | 45 ++++++++++++++++++++-------------------------
 1 file changed, 20 insertions(+), 25 deletions(-)

diff --git a/cmd/net.c b/cmd/net.c
index 01332d57b98..7c7489efe4d 100644
--- a/cmd/net.c
+++ b/cmd/net.c
@@ -312,10 +312,6 @@ static int parse_addr_size(char * const argv[])
  * parse_args() - parse command line arguments
  *
  * Sets:
- *
- * - net_boot_file_name_explicit to true if a filename was specified
- * - net_boot_file_name to that filename, if specified, else the value of the
- *	'bootfile' environment variable
  * - image_load_addr if a load address was provided
  * - image_save_addr and image_save_size, if proto == TFTPPUT
  *
@@ -323,21 +319,20 @@ static int parse_addr_size(char * const argv[])
  * @argc:	number of arguments, include the command, which has already been
  *		parsed
  * @argv:	command line arguments, with argv[0] being the command
+ * @fnamep:	set to the filename, if provided, else NULL
  * Return:	0 on success
  */
-static int parse_args(enum proto_t proto, int argc, char *const argv[])
+static int parse_args(enum proto_t proto, int argc, char *const argv[],
+		      const char **fnamep)
 {
 	ulong addr;
 	char *end;
 
+	*fnamep = NULL;
 	switch (argc) {
 	case 1:
 		if (IS_ENABLED(CONFIG_CMD_TFTPPUT) && proto == TFTPPUT)
 			return 1;
-
-		/* refresh bootfile name from env */
-		copy_filename(net_boot_file_name, env_get("bootfile"),
-			      sizeof(net_boot_file_name));
 		break;
 
 	case 2:
@@ -350,16 +345,10 @@ static int parse_args(enum proto_t proto, int argc, char *const argv[])
 		 * mis-interpreted as a valid number.
 		 */
 		addr = hextoul(argv[1], &end);
-		if (end == (argv[1] + strlen(argv[1]))) {
+		if (end == (argv[1] + strlen(argv[1])))
 			image_load_addr = addr;
-			/* refresh bootfile name from env */
-			copy_filename(net_boot_file_name, env_get("bootfile"),
-				      sizeof(net_boot_file_name));
-		} else {
-			net_boot_file_name_explicit = true;
-			copy_filename(net_boot_file_name, argv[1],
-				      sizeof(net_boot_file_name));
-		}
+		else
+			*fnamep = argv[1];
 		break;
 
 	case 3:
@@ -368,9 +357,7 @@ static int parse_args(enum proto_t proto, int argc, char *const argv[])
 				return 1;
 		} else {
 			image_load_addr = hextoul(argv[1], NULL);
-			net_boot_file_name_explicit = true;
-			copy_filename(net_boot_file_name, argv[2],
-				      sizeof(net_boot_file_name));
+			*fnamep = argv[2];
 		}
 		break;
 
@@ -378,20 +365,20 @@ static int parse_args(enum proto_t proto, int argc, char *const argv[])
 	case 4:
 		if (parse_addr_size(argv))
 			return 1;
-		net_boot_file_name_explicit = true;
-		copy_filename(net_boot_file_name, argv[3],
-			      sizeof(net_boot_file_name));
+		*fnamep = argv[3];
 		break;
 #endif
 	default:
 		return 1;
 	}
+
 	return 0;
 }
 
 static int netboot_common(enum proto_t proto, struct cmd_tbl *cmdtp, int argc,
 			  char *const argv[])
 {
+	const char *fname;
 	char *s;
 	int   rcode = 0;
 	int   size;
@@ -415,11 +402,19 @@ static int netboot_common(enum proto_t proto, struct cmd_tbl *cmdtp, int argc,
 		}
 	}
 
-	if (parse_args(proto, argc, argv)) {
+	if (parse_args(proto, argc, argv, &fname)) {
 		bootstage_error(BOOTSTAGE_ID_NET_START);
 		return CMD_RET_USAGE;
 	}
 
+	if (fname) {
+		net_boot_file_name_explicit = true;
+	} else {
+		net_boot_file_name_explicit = false;
+		fname = env_get("bootfile");
+	}
+	copy_filename(net_boot_file_name, fname, sizeof(net_boot_file_name));
+
 	if (IS_ENABLED(CONFIG_IPV6) && !use_ip6) {
 		char *s, *e;
 		size_t len;
-- 
2.34.1